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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include <stdlib.h>
     18 #include <stdio.h>
     19 #include <stdint.h>
     20 
     21 #include "GLExtensions.h"
     22 
     23 namespace android {
     24 // ---------------------------------------------------------------------------
     25 
     26 ANDROID_SINGLETON_STATIC_INSTANCE( GLExtensions )
     27 
     28 GLExtensions::GLExtensions()
     29     : mHaveTextureExternal(false),
     30       mHaveNpot(false),
     31       mHaveDirectTexture(false)
     32 {
     33 }
     34 
     35 void GLExtensions::initWithGLStrings(
     36         GLubyte const* vendor,
     37         GLubyte const* renderer,
     38         GLubyte const* version,
     39         GLubyte const* extensions,
     40         char const* egl_vendor,
     41         char const* egl_version,
     42         char const* egl_extensions)
     43 {
     44     mVendor     = (char const*)vendor;
     45     mRenderer   = (char const*)renderer;
     46     mVersion    = (char const*)version;
     47     mExtensions = (char const*)extensions;
     48     mEglVendor     = egl_vendor;
     49     mEglVersion    = egl_version;
     50     mEglExtensions = egl_extensions;
     51 
     52     char const* curr = (char const*)extensions;
     53     char const* head = curr;
     54     do {
     55         head = strchr(curr, ' ');
     56         String8 s(curr, head ? head-curr : strlen(curr));
     57         if (s.length()) {
     58             mExtensionList.add(s);
     59         }
     60         curr = head+1;
     61     } while (head);
     62 
     63     curr = egl_extensions;
     64     head = curr;
     65     do {
     66         head = strchr(curr, ' ');
     67         String8 s(curr, head ? head-curr : strlen(curr));
     68         if (s.length()) {
     69             mExtensionList.add(s);
     70         }
     71         curr = head+1;
     72     } while (head);
     73 
     74 #ifdef EGL_ANDROID_image_native_buffer
     75     if (hasExtension("GL_OES_EGL_image") &&
     76         (hasExtension("EGL_KHR_image_base") || hasExtension("EGL_KHR_image")) &&
     77         hasExtension("EGL_ANDROID_image_native_buffer"))
     78     {
     79         mHaveDirectTexture = true;
     80     }
     81 #else
     82 #warning "EGL_ANDROID_image_native_buffer not supported"
     83 #endif
     84 
     85     if (hasExtension("GL_ARB_texture_non_power_of_two")) {
     86         mHaveNpot = true;
     87     }
     88 
     89     if (hasExtension("GL_OES_EGL_image_external")) {
     90         mHaveTextureExternal = true;
     91     } else if (strstr(mRenderer.string(), "Adreno")) {
     92         // hack for Adreno 200
     93         mHaveTextureExternal = true;
     94     }
     95 
     96     if (hasExtension("GL_OES_framebuffer_object")) {
     97         mHaveFramebufferObject = true;
     98     }
     99 }
    100 
    101 bool GLExtensions::hasExtension(char const* extension) const
    102 {
    103     const String8 s(extension);
    104     return mExtensionList.indexOf(s) >= 0;
    105 }
    106 
    107 char const* GLExtensions::getVendor() const {
    108     return mVendor.string();
    109 }
    110 
    111 char const* GLExtensions::getRenderer() const {
    112     return mRenderer.string();
    113 }
    114 
    115 char const* GLExtensions::getVersion() const {
    116     return mVersion.string();
    117 }
    118 
    119 char const* GLExtensions::getExtension() const {
    120     return mExtensions.string();
    121 }
    122 
    123 char const* GLExtensions::getEglVendor() const {
    124     return mEglVendor.string();
    125 }
    126 
    127 char const* GLExtensions::getEglVersion() const {
    128     return mEglVersion.string();
    129 }
    130 
    131 char const* GLExtensions::getEglExtension() const {
    132     return mEglExtensions.string();
    133 }
    134 
    135 
    136 // ---------------------------------------------------------------------------
    137 }; // namespace android
    138